kotlin-node/node.events/EventEmitter/Companion/listenerCount

listenerCount

fun listenerCount(emitter: EventEmitter, type: EventType): Double(source)

A class method that returns the number of listeners for the given eventName registered on the given emitter.

import { EventEmitter, listenerCount } from 'node:events';

const myEmitter = new EventEmitter();
myEmitter.on('event', () => {});
myEmitter.on('event', () => {});
console.log(listenerCount(myEmitter, 'event'));
// Prints: 2
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Since

v0.9.12

Parameters

emitter

The emitter to query

eventName

The event name